From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 7B282A04B1; Thu, 27 Aug 2020 18:16:24 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 188991C192; Thu, 27 Aug 2020 18:14:00 +0200 (CEST) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id 6BB7C1C0B0 for ; Thu, 27 Aug 2020 18:13:43 +0200 (CEST) IronPort-SDR: +KqGqj3XHPuEMyPipIGb5Utr8Xi/ErYK5Ln+L44TSFwkMkpCKBbsQSGkYaK8XIc/docuNxPzww SuL4MKy2EW1Q== X-IronPort-AV: E=McAfee;i="6000,8403,9726"; a="220767057" X-IronPort-AV: E=Sophos;i="5.76,360,1592895600"; d="scan'208";a="220767057" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Aug 2020 09:13:40 -0700 IronPort-SDR: 2z+PgT1K401wMVKnwYiwnwwMUjE8KwriRmlaFnFVcysoqjev/bgJz+lp3AJZAktz94VGcrwHO8 OHXAXapTCsQg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,360,1592895600"; d="scan'208";a="280681621" Received: from silpixa00399953.ir.intel.com (HELO silpixa00399953.ger.corp.intel.com) ([10.237.222.53]) by fmsmga007.fm.intel.com with ESMTP; 27 Aug 2020 09:13:39 -0700 From: Ciara Power To: dev@dpdk.org Cc: Ciara Power , Byron Marohn , Yipeng Wang Date: Thu, 27 Aug 2020 17:13:03 +0100 Message-Id: <20200827161304.32300-17-ciara.power@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200827161304.32300-1-ciara.power@intel.com> References: <20200807155859.63888-1-ciara.power@intel.com> <20200827161304.32300-1-ciara.power@intel.com> Subject: [dpdk-dev] [PATCH v2 16/17] efd: add checks for max SIMD bitwidth X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" When choosing a vector path to take, an extra condition must be satisfied to ensure the max SIMD bitwidth allows for the CPU enabled path. Cc: Byron Marohn Cc: Yipeng Wang Signed-off-by: Ciara Power --- lib/librte_efd/rte_efd.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/lib/librte_efd/rte_efd.c b/lib/librte_efd/rte_efd.c index 6a799556d4..509ecc8256 100644 --- a/lib/librte_efd/rte_efd.c +++ b/lib/librte_efd/rte_efd.c @@ -645,7 +645,9 @@ rte_efd_create(const char *name, uint32_t max_num_rules, uint32_t key_len, * For less than 4 bits, scalar function performs better * than vectorised version */ - if (RTE_EFD_VALUE_NUM_BITS > 3 && rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2)) + if (RTE_EFD_VALUE_NUM_BITS > 3 + && rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) + && rte_get_max_simd_bitwidth() >= RTE_MAX_256_SIMD) table->lookup_fn = EFD_LOOKUP_AVX2; else #endif @@ -655,7 +657,8 @@ rte_efd_create(const char *name, uint32_t max_num_rules, uint32_t key_len, * than vectorised version */ if (RTE_EFD_VALUE_NUM_BITS > 16 && - rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) + rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON) && + rte_get_max_simd_bitwidth() >= RTE_MAX_128_SIMD) table->lookup_fn = EFD_LOOKUP_NEON; else #endif -- 2.17.1